Fuel-economizer for internal-combustion engines.



H. A. STONE. FUEL EcoNoMlzER FOR INTERNAL coMusTloN ENmNEs.

APPLICATION FILED FEB.27. 1914.

Patented May11,1915.

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TENT Ero HERMAN: A. STONE, oE'oLEvELANii,`oHIo, AssIGNoE or ONE- HALE To 'GUs'rAvE n.

" sroNE, or CLEVELAND, onro. f

FUEL-EcoNoMrzEn 'Eon INTERNALCOMBUSTION ENGINES.

insao'si.'

.Specification of Letters Patent.

Patent-eu May ai, reis.

Application led February?, 1914. Serial No. 821,407.

Cleveland, in the [county of Cuyahoga and State of Ohio, have inventeda. certain new and useful Improvement in Fuel-Economizers for Internal-Combustion Engines, of which the `following isa ful1,clear, and exact description. n

.Th object of this invention is toreduce the cost of fuel consumed by lan internal combustion engine, and at the same time in crease the-eiioiency of said engine.

' The invention is a cheap and simple device capable of being easily applied to essential adjun'cts of the engine, so as to utilize in a high degree the heat of the exhaust gases from the engine to heat both the air and the liquid fuel prior to their delivery to the carbureter. The device not, only accomplishes the obviously desirable results above mentioned, but it also, in a marked degree, reduces the back pressure on the motor, which, of4 course, increases its efficiency.

The invention consists in the construction and combination ofpartsp'hereinafter described and pointed out definitely in the appended claims. p

lIn the drawing, Figure l is a vertical central longitudinal section of one form of the ,device clamped upon and supported by two separated but alined sections of the exhaust pipe ofthe engine. Fig. 2 is any end view of the construction shown in Fig. 1. Fig. 3 is a transverse vertical section thereof in the plane of line 3*?) on Fig. 1. Fig. 4 is a plan view partlybroken away of a modified form of the device; and Fig. 5 is a transverse section thereof in the plane of line 5 5 on Fig. 4.

. Referring to the parts by letters, A, A1 represent two alined sections of the exhaust pipe of an internal combustion engine,-the section A coming from the motor, and the section A1 going to a suitable point where it may be dischargedinto the atmosphere, or be connected with amuiiler, as desired. The two exhaust pipe sections shown are such as would be produced by cutting opt three inches, more or less, of the ordinary exhaust pipe which is connected to the engine.

B represents a vheating and expansion,

chamber, into which the exhaust pipe sections A, A1 project through vholes o in the ends of said chamberfthe exhaust pipes being nicely fitted in said holes. This chamber is a box like affair composed of a body b, and a cover '61, which parts areseparably connected together by bolts 123,-the plane of division between the body and cover passing diametrically through the two holes b2 in the ends of said chamber.

C represents an air pipe which passes throughthe box by way of holes b4 in its ends. vOne end of this air pipe is open to the atmosphere, and the other--end is tobe connected with the air inlet of the carbureter,s o that, on the suction strokes of the associated engine, .air will be drawn into the carbureter through this pipe. Hot exhaust gases from the engine will be discharged into this chamber from the exhaust pipe section A; and since the cross sec tional area of this pipe is very much less than the cross sectionalparea of the chamber B, these gases are able to expand, and thereby greatly reduce the back pressure on the engine. Indeed it serves in a limited degree the same purposes as the muliier; but, since it is placed nearer the engine than the muiHer can be, the engine will sooner feel its eiects. The hot gases in the chamber B will come into direct contact with the air pipe C, and will heat it, and consequently will heat the air iiowing through it. To insure that the hot gases shall come into eiective contact with said air pipe C. a

baiie plate D is made to extend from that wall of the chamber B which is most remote from the air pipe C: and this baffle plate passes in a diagonal direction from this wall across the axis of the exhaust pipe sections and away from the inlet section A. and into substantial contact with the air pipe C. The width of this baille plate is such that it extends from the front'to the rear wall of the chamber. Near the outlet end of chamber B this bafiie plate is recurved upward into substantial contact with the outlet section A1 of the exhaust pipe.v The incoming current of hot gases, delivered from the exhaust pipe section A, will strike the inclined face of thisl baille plate and will be deiiected, thereby, and caused to flow around the air. pipe C. and into intimate contact therewith; but will not be much retarded bysaidinclined baile plate. After flowing around the air pipe C the gaseswill pass around the endpf the baille plate into the upper part of the chamber, and thence into and out through the outlet section A1 of the exhaust pipe.

In the construction referred to there is a hole be extending from one end of the cover to the othei` and formed in an upwardly projecting rib 67 on the cover. E represents the liquid fuel pipe which passes through this hole. Obviously the metal of the cover will be heated, and this heat will in turn be largely imparted to the fuel pipe and thereby the liquid fuel fiowing through said pipe will be heated. This fuel pipe is to be connected at one end with a source of fuel supyply and at the other end of the carburetor. In the construction shown in Figs. 4 and 5 the two separable parts of thechamber are parted in a plane which passes diametrically through the exhaust pipe sections and through the air pipe C. rlhis form is preferred for use in some of the automobile constructions now on the market, in which the exhaust pipes are so arranged that the other form of device cannot be conveniently attached to the exhaust pipe. In this conl struction the bafiie plate, when the two parts of the chamber are together, is shaped and arranged substantially as shown in the other figures, and before described, but one-half of the baiiie plate is cast integral with one part of the chamber, and the other part of the bafe plate is cast integral with the other part of the chamber, so that when these two parts are secured together, the two bafie plate sections will engage edge to edge and from one end to the other.

Having described my invention, claim:

In a device of the character specified, the combination of a chamber comprising a body and acap separably connected therewith, each of said parts having in both end walls one-half of a circular hole, two separated sections of a pipe for conveying hot gases, which sections pass respectivelyT through the two holes specified, means for drawing together the two parts of said chamber to clamp them upon said pipe sections, a fiuid supply pipe which passes through said chamber and out through both end walls thereof, and a fluid supply pipe which passes through one wall of said chamber from end to end thereof and projects beyond both of said ends.

2. 'In combination with two separated sections of a pipe for conveying hot gases, of a chamber into which said pipe sections project through holes in which said pipe sections fit, an air pipe which passes through said chamber and out of the same through the walls thereof, said chamber having in one wall a hole whichv extends from end to end of the chamber, and a fuel pipe extending through said hole and projecting from both ends thereof.

3. in a device of the character described, the combination of two alined and separated sections of a pipe for conveying hot gases, a heating and expansion chamber through opposite ends of which said pipe sections project, an air pipe which extends through said chamber and out through holes in both end walls thereof, a bathe plate connected with one wall of said chamber and extending therefrom between the separated ends of said pipe section in 'an inclined direction toward said air pipe, the free end of said baffle plate being recurved and lying between and in contact with the air pipe and one of said exhaust pipe sections.

In testimony whereof, hereunto aix my signature in the presence of two witnesses'.

HERMAN A. STNE.

Witnesses:

E. L. TrrrrRs'roN, L. I. PORTER. 

